Controlling access to computer accounts managed by a computer account server to provide handoff to a nominee computer terminal

A computer account server receives a nominee identity from an account owner associated with owner access credentials. The nominee identity is stored in a data structure of a computer account that is selected based on the owner access credentials. Electronic access to information stored in the data structure is then restricted to access requests from computer terminals that provide the owner access credentials. In response to determining that an account handoff event has become satisfied for the computer account, the computer account server sends a nominee handoff message using the nominee identity retrieved from the data structure. A nominee access request message is received from a nominee computer terminal. In response to validating content of the nominee access request message, the computer account server modifies the restriction of electronic access to grant the nominee computer terminal electronic access to the information stored in the data structure of the computer account.